mtg duskmourn house of horror commander deck Magic: The Gathering Duskmourn: those who did receive the correct deck found it to be of good quality and precisely what they expected Temple of Deceit | Duskmourn:

Any "As this creature enters," "This creature enters with," and "When this creature enters" abilities of the chosen card will work

The mono-color legendary land cycle will all see some amount of play, but its hard to argue against Minas Tirith and Barad-dur being the spiciest

That's enough to start forging your own competitive deck, especially when combined with the Collection Starter Set listed above or cards from Gateway

Gruul (red/green) is one of the most aggressive color combinations in Magic The Gathering

The exceptions are competitive commons you've identified as format staples and debut-franchise Enchanted prints you genuinely want for your collection